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The early Miocene onset of a ventilated circulation regime in the Arctic Ocean

Author

Listed:
  • Martin Jakobsson

    (Department of Geology and Geochemistry,)

  • Jan Backman

    (Department of Geology and Geochemistry,)

  • Bert Rudels

    (Finnish Institute for Marine Research, F-00561 Helsinki, Finland)

  • Jonas Nycander

    (Stockholm University, SE-106 91 Stockholm, Sweden)

  • Martin Frank

    (Leibniz Institute of Marine Sciences at the University of Kiel (IFM-GEOMAR), DE-24148 Kiel, Germany)

  • Larry Mayer

    (Center for Coastal and Ocean Mapping, University of New Hampshire, Durham, New Hampshire 03824, USA)

  • Wilfried Jokat

    (Alfred Wegener Institute for Polar Research, DE-27570 Bremerhaven, Germany)

  • Francesca Sangiorgi

    (Laboratory of Palaeobotany and Palynology, Utrecht University, NL-3584 Utrecht, The Netherlands)

  • Matthew O’Regan

    (Graduate School of Oceanography, University of Rhode Island, Narragansett, Rhode Island 02882, USA)

  • Henk Brinkhuis

    (Laboratory of Palaeobotany and Palynology, Utrecht University, NL-3584 Utrecht, The Netherlands)

  • John King

    (Graduate School of Oceanography, University of Rhode Island, Narragansett, Rhode Island 02882, USA)

  • Kathryn Moran

    (Graduate School of Oceanography, University of Rhode Island, Narragansett, Rhode Island 02882, USA)

Abstract

Birth of an ocean Deep-water formation in the northern North Atlantic and the Arctic Ocean is a key driver of global thermohaline circulation and hence of global climate. The lack of sediments from the Arctic's deep-sea floor has hampered research into this area, but this changed when drill cores were recovered from the central Arctic Ocean in 2004, during the ACEX experiment. This unique 428-metre-thick Cenozoic sediment sequence preserves a critical piece of palaeo-environmental history: the advent of the Arctic Ocean in its current form. The gradual opening of the Fram Strait resulted in a change from a land-enclosed lake-like water body to an estuarine 'Black Sea type' phase with variable ventilation, and finally to the fully ventilated 'ocean' phase, some 17.5 million years ago.

Suggested Citation

  • Martin Jakobsson & Jan Backman & Bert Rudels & Jonas Nycander & Martin Frank & Larry Mayer & Wilfried Jokat & Francesca Sangiorgi & Matthew O’Regan & Henk Brinkhuis & John King & Kathryn Moran, 2007. "The early Miocene onset of a ventilated circulation regime in the Arctic Ocean," Nature, Nature, vol. 447(7147), pages 986-990, June.
    • Handle: RePEc:nat:nature:v:447:y:2007:i:7147:d:10.1038_nature05924
    DOI: 10.1038/nature05924
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